PMC:329117 / 141-220 JSONTXT

{"project":"craft-sa-dev","denotations":[{"id":"T265","span":{"begin":4,"end":10},"obj":"NNS"},{"id":"T267","span":{"begin":10,"end":11},"obj":"sentence"}],"text":"ion levels\n\nPrevious computational analyses have identified approximately 1,500"}